Time management is a set of principles, practices, skills, tools, and systems that work together to help you get more value out of your time with the aim of improving the quality of your life.
In arriving at a definition of time management, it is important to note that time management is a broad subject that covers many different areas from your day-to-day actions to your long term goals.
Some of the skills associated with time management include planning, prioritizing, goal setting, scheduling, and managing your workload.
A good time management system integrates all these different skills using a consistent set of tools designed to work well with each other.
Reff: http://www.managementhelp.org/prsn_prd/time_mng.htm for more information